fix: rest-api/trusted-auth-server-python/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-PYTHONDOTENV-16115271

Author: snyk-io[bot]

rest-api/trusted-auth-server-python/requirements.txt

@@ -1,4 +1,4 @@
 Flask==2.2.5
 Werkzeug==3.0.6
 requests==2.32.4
-python-dotenv==0.19.0
+python-dotenv==1.2.2